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Plesk Installer shows pre-upgrade warning: Given <password> is incorrect. Access denied for user ''@'localhost' (using password: NO)

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Vladimir Chernikov
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Plesk for Windows kb: technical ABT: Group B

Applicable to:

  • Plesk for Windows

Symptoms

  • The following pre-upgrade warning is shown when trying to upgrade Plesk:

    CONFIG_TEXT: Components and product validation detected at least one important issue:
    Plesk pre-upgrade checking...
    WARNING: [MYSQL ERROR] Given <password> is incorrect. Access denied for user ''@'localhost' (using password: NO)
    Proceeding with installation or upgrade without resolving the issues
    that were found can corrupt your data.

  • The client MySQL service is not listed at Start > Administrative Tools > Services

  • The following command shows no output:

    C:\> netstat -a | findstr 3306

  • There is just one database shown at Plesk > Tools & Services > Databases. And it's a Microsoft SQL Server one.

Cause

Client MySQL is not installed on the server. As a result, Plesk Installer tries to parse it but fails.

Resolution

The pre-upgrade warning can be safely ignored.

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